Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b38d7e2de5d6dd7…

MALICIOUS

PDF

78.4 KB Created: 2021-06-21 08:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b4dc570ec3a351dc892f2b9457d2fc69 SHA-1: 8d32e2f28a88572eaafd196bf490e6a430f77a06 SHA-256: 5b38d7e2de5d6dd77dca70ba7032fff7e90fcbbec8cad7f27d8e6a4b76273b43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malware or conduct phishing. The document body, though heavily obfuscated, contains text related to 'Salam indir minecraft 1.7 9', indicating a lure to download a game, which is a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/13o75kl5ffarnfb7ibtstih1mh/8046966971.pdf In PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830b05207c5---mefadugiwifiwafeja.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/164236fc9e0220c328a9cb6f0a0596be/momaruforejajazelad.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/2978675881.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609be5cfa12c1---pofuwu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/de09b613ba3765bdf05fc34b6990deb5/27926196179.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8it5cb7o8726dsbscdj7ii559r/fepapiduz.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088e672ddd38---16014425890.pdfIn PDF document text
    • https://attack.lt/images/files/87648412032.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160739bab31e7d---winarawabazopeno.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08b7e0760---gepovoge.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed979a8a0---7075150114.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/gexevilirixuteziv.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/55644553894.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7c1e55fda---fogilatenudoxosedigexow.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/tevorunigodizabenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sa%25C4%259Flam+indir+minecraft+1.7+9PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 5644 bytes
SHA-256: 8342399da9b4544ca7ae624a81aaa73921e6cb8012aee95727b9d76fff2962e6
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 12804 bytes
SHA-256: 19fae29c4e71d0d60bfe0d0f4060a0dafdf1b08c08e1795b145f19f7b98d1a56